'\" te
.\" Copyright (c) 2006, Sun Microsystems, Inc.,
.\" All Rights Reserved
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.TH SCSI_RESET_NOTIFY 9F "Jan 16, 2006"
.SH NAME
scsi_reset_notify \- notify target driver of bus resets
.SH SYNOPSIS
.nf
#include <sys/scsi/scsi.h>



\fBvoid\fR \fBscsi_reset_notify\fR(\fBstruct scsi_address *\fR\fIap\fR, \fBint\fR \fIflag\fR,
     \fBvoid\fR (*\fIcallback)(caddr_t)\fR, \fBcaddr_t\fR \fIarg\fR);
.fi

.SH INTERFACE LEVEL
illumos DDI specific (illumos DDI).
.SH PARAMETERS
.ne 2
.na
\fB\fIap\fR\fR
.ad
.RS 12n
Pointer to the \fBscsi_address\fR structure.
.RE

.sp
.ne 2
.na
\fB\fIflag\fR\fR
.ad
.RS 12n
A flag indicating registration or cancellation of the notification request.
.RE

.sp
.ne 2
.na
\fB\fIcallback\fR\fR
.ad
.RS 12n
A pointer to the target driver's reset notification function.
.RE

.sp
.ne 2
.na
\fB\fIarg\fR\fR
.ad
.RS 12n
The callback function argument.
.RE

.SH DESCRIPTION
The \fBscsi_reset_notify()\fR function is used by a target driver when it needs
to be notified of a bus reset. The bus reset could be issued by the transport
layer (e.g. the host bus adapter (\fBHBA)\fR driver or controller) or by
another initiator.
.sp
.LP
The  argument \fIflag\fR is used to register or cancel the notification. The
supported values for \fIflag\fR are as follows:
.sp
.ne 2
.na
\fB\fBSCSI_RESET_NOTIFY\fR\fR
.ad
.RS 21n
Register \fIcallback\fR as the reset notification function for the target
driver.
.RE

.sp
.ne 2
.na
\fB\fBSCSI_RESET_CANCEL\fR\fR
.ad
.RS 21n
Cancel the reset notification request.
.RE

.sp
.LP
Target drivers can find out whether the \fBHBA\fR driver and controller support
reset notification by checking the  \fBreset-notification\fR capability using
the \fBscsi_ifgetcap\fR(9F) function.
.SH RETURN VALUES
If \fIflag\fR is \fBSCSI_RESET_NOTIFY\fR, \fBscsi_reset_notify()\fR returns:
.sp
.ne 2
.na
\fB\fBDDI_SUCCESS\fR\fR
.ad
.RS 15n
The notification request has been accepted.
.RE

.sp
.ne 2
.na
\fB\fBDDI_FAILURE\fR\fR
.ad
.RS 15n
The transport layer does not support reset notification or could not accept
this request.
.RE

.sp
.LP
If \fIflag\fR is \fBSCSI_RESET_CANCEL\fR, \fBscsi_reset_notify()\fR returns:
.sp
.ne 2
.na
\fB\fBDDI_SUCCESS\fR\fR
.ad
.RS 15n
The notification request has been canceled.
.RE

.sp
.ne 2
.na
\fB\fBDDI_FAILURE\fR\fR
.ad
.RS 15n
No notification request was registered.
.RE

.SH CONTEXT
The \fBscsi_reset_notify()\fR function can be called from user, interrupt, or
kernel context.
.SH SEE ALSO
.BR scsi_ifgetcap (9F),
.BR scsi_address (9S)
.sp
.LP
\fIWriting Device Drivers\fR
